Synopsis: Hugh Anthony Disward inherits an old mansion and a personal লাইব্রেরি from his grandfather. In the basement of the mansion, he meets a mysterious girl Dalian. She is a Dantalian and a gateway to "Dantalian's bookshelf", which stores the prohibited বই of the demons.

"Gensho (Illusory Books)", the prohibited books, endanger the balance of the world but people are fascinated দ্বারা the taboo. Huey and Dalian solve the cases involving Gensho with their ability to access the Dantalian's bookshelf.